Man O' War 3/29/17 - 11/1/47 Sire of 1937 Triple Crown winner, War Admiral and grandsire of Seabiscuit. Man o' War rescued American horseracing in the 1920s, despite competing for just two years. Following his death, he was voted the greatest thoroughbred of the first half of the 20th Century. Following his brilliant 1919 debut, Man o' War won three stakes races in 17 days, and when he retired 16 months later, he was a national hero. Man o' War won 20 of his 21 races.